Vim & Vision
[ #62 ] iTunes vs. SongBird (Resource Battle) Permalink
Here are four grabs from top, with both apps not playing anything, just sitting around:
PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
2963 songbird 4.4% 0:15.06 19 202 1044 52.2M+ 55.6M+ 83.6M 722M
2951 iTunes 0.0% 0:02.59 12 223 354 21.8M 36.9M 40.8M 462M
2963 songbird 4.1% 0:30.20 18 201 1032 54.9M+ 53.4M 85.5M+ 693M
2951 iTunes 0.0% 0:02.86 12 223 353 21.8M 36.6M 40.8M 461M
2995 iTunes 0.0% 0:02.13 12 223 352 21.7M 37.7M 40.9M 461M
2993 songbird 1.5% 0:04.39 18 141 774 42.5M+ 49.7M 69.5M+ 655M+
2995 iTunes 0.0% 0:02.19 12 223 352 21.7M 37.6M 40.8M 461M
2993 songbird 1.7% 0:05.80 15 136 764 42.5M 49.7M 69.5M 654M
What do those headings mean?
- CPU Percentage of processor time consumed (kernel and user)
- TH Number of threads
- RPRVT Resident private memory size
- RSHRD Resident shared memory size
- RSIZE Total resident memory size, including shared pages
- VSIZE Total address space allocated, including shared pages
So SongBird uses a bit more memory than iTunes and seems to be doing some processing even when there is nothing being played.
When I play the exact same song on both (at the same time) this is what happens (four grabs again):
PID COMMAND %CPU TIME #TH #PRTS #MREGS RPRVT RSHRD RSIZE VSIZE
2995 iTunes 14.7% 0:04.53 15 231 367 23.3M 37.3M 42.8M+ 465M
2993 songbird 13.3% 0:13.33 19 185 893 46.0M 52.0M 75.4M+ 668M+
2995 iTunes 5.1% 0:06.97 15 231 367 23.3M 37.4M 42.8M 465M
2993 songbird 13.8% 0:18.66 18 184 890 44.5M 52.1M 73.7M- 666M-
2995 iTunes 5.0% 0:08.27 15 231 367 23.3M 37.6M 42.8M 465M
2993 songbird 14.3% 0:21.41 18 184 900 45.1M+ 52.3M 74.3M+ 667M+
2995 iTunes 5.1% 0:09.44 15 231 367 23.3M 37.7M 42.8M 465M
2993 songbird 13.2% 0:23.84 18 184 910 45.7M+ 52.4M 74.9M+ 667M+
So SongBird is the bigger hog, I think.
P.S.: The test song was Girl U Want - Devo
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